Separation structure for dust cup of vacuum cleaner

ABSTRACT

A separation structure for a dust cup of a vacuum cleaner is provided and includes a cyclone separator. The cyclone separator is provided with a connecting ring, a plurality of arc blades, a plurality of flat plates, a conical tube and a cylindrical tube. Each arc blade has a top fixedly connected with the connecting ring and a bottom fixedly connected with a respective flat plate. The flat plates are fixedly mounted at a large end of the conical tube. A plurality of air inlets are formed by gaps defined by the connecting ring, the arc blades and the flat plates. The cylindrical tube is fixedly connected with and communicated with the conical tube. A small end of the conical tube is received in the cylindrical tube. An included angle between each arc blade and the respective flat plate is an obtuse angle.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a continuation-application of International.Application PCT/CN2021/132318, with an international filing date of Nov.23, 2021, which claims foreign priority of Chinese Patent ApplicationNo. 202121332996.8, filed on Jun. 16, 2021, the contents of all of whichare hereby incorporated by reference.

TECHNICAL FIELD

The present disclosure relates to relates to the technical field ofvacuum cleaners, in particular to a separation structure for a dust cupof a vacuum cleaner.

BACKGROUND

In a present vacuum cleaner, a filter unit and including a single-conesingle-stage cyclone filter structure or a multi-cone multi-stagecyclone filter structure is provided to facilitate cleaning. Thesingle-cone single-stage cyclone filter structure includes a cycloneseparation structure with only one stage, for once separating air flowfrom which impurities is to be separated. The multi-cone multi-stagecyclone filter structure includes a cyclone separation structure withtwo or more stages, where a direction of the air flow being dischargedfrom an air outlet of a primary cyclone separation structure issubstantially the same as a direction of the air flow entering asecondary cyclone separation structure. A cross-sectional area of theair outlet of the primary cyclone separation structure is generallylarger than a cross-sectional area of an air inlet of the secondarycyclone separation structure, so that the air flow entering thesecondary cyclone separation structure will be continuously speeded upto improve cyclone separation effect. At present, the single-conesingle-stage cyclone filter structure is usually employed for asmall-sized vacuum cleaner, and due to its low cyclone separationefficiency, it is difficult to achieve effective dust separation andfiltration. The multi-cone and multi-stage cyclone filter structure isof structural complexity and occupies a large space, which makes itdifficult to follow development of the vacuum cleaner towardsminiaturization. Therefore, both the single-cone single-stage cyclonefilter structure and the multi-cone multi-stage cyclone filter structureat present have unavoidable disadvantages, resulting in undesirable userexperience and low cleaning efficiency.

SUMMARY

In order to solve the above problems, the present disclosure provides aseparation structure for a dust cup of a vacuum cleaner.

The present disclosure is realized by the following technical schemes.

The present disclosure provides a separation structure for a dust cup ofa vacuum cleaner. The separation structure includes a cyclone separatorprovided with a connecting ring, a plurality of arc blades, a pluralityof flat plates, a conical tube and a cylindrical tube. Each of theplurality of arc blades has a top fixedly connected with the connectingring and a bottom fixedly connected with a respective one of theplurality of flat plates. The plurality of flat plates are fixedlymounted at a large end of the conical tube. A plurality of air inletsare formed by gaps defined by the connecting ring, the plurality of arcblades and the a plurality of flat plates. The cylindrical tube isfixedly connected with and communicated with the conical tube. A smallend of the conical tube is received in the cylindrical tube. An includedangle between each of the plurality of arc blades and the respective oneof the plurality of flat plates is an obtuse angle.

In an embodiment, the cyclone separator is provided with four arc bladesand four flat plates. The four arc blades and the four plates areuniformly arranged at the large end of the conical tube along acircumference of the large end to define four air inlets.

In an embodiment, the small end of the conical tube is provided withfour dust discharging openings and one dust falling opening.

In an embodiment, the separation structure further includes a dust cup,a dust-proof skirt, and a filter screen. A bottom of the filter screenis fixedly connected to the dust-proof skirt. The dust-proof skirt andthe filter screen are received in the dust cup. A bottom of thecylindrical tube abuts on a bottom wall of the dust cup.

In an embodiment, a height from an upper surface of the connecting ringto a lower surface of the flat plate is H1, a height of the conical tubeis H2, and a ratio of H2 to H1 is in a range of 2 to 3.

In an embodiment, a height of the filter screen is H3, and a ratio of H3to H1 is in a range of 2 to 2.5.

In an embodiment, a maximum outer diameter of the air inlet along acentral axis is D1, an outer diameter of the filter screen is D2, and aratio of D1 to D2 is in a range of 0.8 to 0.9.

In an embodiment, a distance from an outermost side of the dust-proofskirt to an inner side surface of the dust cup is D3, which is in arange of 6 mm to 10 mm.

The present disclosure has the following advantageous effects.

The separation structure according to the present disclosure is asingle-cone cyclone filter structure. A primary separation may occurbetween a side wall of the dust cup and the filter screen, a secondaryseparation and a tertiary separation may occur in the cyclone separator.Herein, the secondary separation occurs in a region from e connectingring to the plate, and the tertiary separation occurs in the conicaltube below a bottom of the plate. Three stages of separation areperformed with the single-cone cyclone filter structure, whicheffectively improves separation effect, so that the separation structureaccording to the present disclosure has both advantages of thesingle-cone cyclone filter structure and the multi-cone cyclone filterstructure. The flow section of the conical tube along a central axis isgradually reduced to ensure continuous acceleration of the rotating airflow, resulting in a better separation effect. After entering thecyclone separator from the air inlets, the air flow rotates in a highspeed and meanwhile is accelerated downward, resulting in a goodseparation effect in the secondary separation and thus ensuring that theair flow enters the tertiary separation with a higher-speed rotating.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to illustrate the technical solutions according to theembodiments of the present disclosure more clearly, the accompanyingdrawings for describing the embodiments are introduced briefly in thefollowing. Apparently, the accompanying drawings in the followingdescription are merely some embodiments of the present disclosure, andthose skilled in the art may derive other drawings from the accompanyingdrawings without creative efforts.

FIG. 1 is a sectional view of a separation structure for a dust cup of avacuum cleaner according to an embodiment of the present disclosure.

FIG. 2 is a perspective view of a cyclone separator according to anembodiment of the present disclosure.

FIG. 3 is another perspective view of the cyclone separator according toan embodiment of the present disclosure.

FIG. 4 is a sectional view of the cyclone separator according to anembodiment of the present disclosure.

DETAILED DESCRIPTION

For clearer and complete description to the technical schemes of thepresent disclosure, the present disclosure is described further withreference to the accompanying drawings.

Referring to FIGS. 1-4 , the present disclosure provides a separationstructure for a dust cup of a vacuum cleaner. The separation structureincludes a cyclone separator 10 which is provided with a connecting ring11, a plurality of arc blades 12, a plurality of flat plates 13, aconical tube 14 and a cylindrical tube 15. A top of each arc blade 12 isfixedly connected with the connecting ring 11, a bottom of each arcblade 12 is fixedly connected with a respective flat plate 13. The flatplates 13 are fixedly mounted at a large end of the conical tube 14.Gaps defined by the connecting ring 11, the arc blades 12 and the flatplates 13 form air inlets 21. The cylindrical tube 15 is fixedlyconnected with and communicated with the conical tube 14. A small end ofthe conical tube 14 is received in the cylindrical tube 15. An includedangle a between each arc blade 12 and a respective flat plate 13 is anobtuse angle. The cyclone separator 10 is provided with four arc blades12 and four flat plates 13, which are uniformly arranged at the largeend of the conical tube 14 along a circumference of the large end todefine four air inlets 21. The small end of the conical tube 14 isprovided with four dust discharging openings 16 and one dust fallingopening 17, and the number of the dust discharging openings 16corresponds to the number of the air inlet openings 21. The separationstructure further includes a dust cup 18, a dust-proof skirt 19, and afilter screen 20. The filter screen 20 is made from, for example,stainless steel. A bottom of the filter screen 20 is fixedly connectedto the dust-proof skirt 19. The dust-proof skirt 19 and the filterscreen 20 are received in the dust cup 18. A bottom of the cylindricaltube 15 abuts on a bottom wall of the dust cup 18.

In this embodiment, the included angle a between the arc blade 12 andthe flat plate 13 is 95.5°. A primary separation may occur between aside wall of the dust cup 18 and the filter screen 20, a secondaryseparation and a tertiary separation may occur in the cyclone separator10. Herein, the secondary separation occurs in a region from theconnecting ring 11 to the plate 13, with a height H1, and the tertiaryseparation occurs in the conical tube 14 below a bottom of the plate 13,with a height H2. After entering the cyclone separator 10 from the airinlets 21, the air flow rotates in a high speed and meanwhile isaccelerated downward, resulting in a good separation effect in thesecondary separation and thus ensuring that the air flow enters thetertiary separation with a higher-speed rotating. The flow section ofthe conical tube 14 along a central axis is gradually reduced to ensurecontinuous acceleration of the rotating air flow, resulting in a betterseparation effect. The conical tube 14 is provided at its bottom thedust discharging openings 16 and the dust falling opening 17, with thenumber of the dust discharging openings 16 corresponding to the numberof the air inlet 21, so that it is ensured that the fine dust is removedfrom the air flow more uniformly at the bottom.

Further, a height from an upper surface of the connecting ring 11 to alower surface of the flat plate 13 is H1, i.e., the height for thesecondary separation, and the height of the conical tube 14 is H2, i.e.,the height of the tertiary separation, and a ratio of H2 to H1 is in arange of 2 to 3. The height of the filter screen is H3, and a ratio ofH3 to H1 is in a range of 2 to 2.5. A maximum outer diameter of the airinlet 21 along the central axis is D1, that is, an outer diameter of theconnecting ring 11 is D1, and an outer diameter of the filter screen isD2, and a ratio of D1 to D2 is in a range of 0.8 to 0.9. A distance froman outermost side of the dust-proof skirt to an inner side surface ofthe dust cup is D3, which is in a range of 6 mm to 10 mm.

In the present embodiment, the mixture of air and waste is sucked intothe dust cup 18 from an inlet of the dust cup 18. A rotating air flow isfirst formed in a flow space between the side wall of the dust cup 18and the filter screen 20. The primary separation is completed by acombined action of the centrifugal force and the filter screen 20, and apart of the waste with large volume is gradually deposited to the bottomof the dust cup 18. The air flow carrying small particles of the wastethrough the filter screen 20 enters the cyclone separator 10. Due to thespecial structural design of the cyclone separator 10, rotation of theair flow is speeded up, so that the small particles are completelyseparated from the air flow. The air flow enters a filter cotton of thedust cup 18 from a return pipe of the dust cup 18, is sucked anddischarged with a motor of the dust cup 18. The small particles of thewaste is gradually deposited to the cylindrical tube 15 at the bottom.The ratio of D1 to D2 is greater than 0.8 to ensure air intakeefficiency. D3 is in the range of 6 mm to 10 mm, so as to prevent thewaste at the bottom from floating up with stirring by the air flow.

It should be appreciated that the present disclosure may have variousembodiments, and other embodiments obtained by those skilled in the artbased on the embodiment in the present description without any creativeeffort fall within the protection scope of the present disclosure.

What is claimed is:
 1. A separation structure for a dust cup of a vacuumcleaner comprising a cyclone separator, wherein the cyclone separator isprovided with a connecting ring, a plurality of arc blades, a pluralityof flat plates, a conical tube and a cylindrical tube, each of theplurality of arc blades has a top fixedly connected with the connectingring and a bottom fixedly connected with a respective one of theplurality of flat plates, the plurality of flat plates are fixedlymounted at a large end of the conical tube, a plurality of air inletsare formed by gaps defined by the connecting ring, the plurality of arcblades and the a plurality of flat plates, the cylindrical tube isfixedly connected with and communicated with the conical tube, a smallend of the conical tube is received in the cylindrical tube, and anincluded angle between each of the plurality of arc blades and therespective one of the plurality of flat plates is an obtuse angle. 2.The separation structure according to claim 1, wherein the cycloneseparator is provided with four arc blades and four flat plates, thefour arc blades and the four plates are uniformly arranged at the largeend of the conical tube along a circumference of the large end to definefour air inlets.
 3. The separation structure according to claim 2,wherein the small end of the conical tube is provided with four dustdischarging openings and one dust falling opening.
 4. The separationstructure according to claim 3, further comprising a dust cup, adust-proof skirt, and a filter screen, wherein a bottom of the filterscreen is fixedly connected to the dust-proof skirt, the dust-proofskirt and the filter screen are received in the dust cup, and a bottomof the cylindrical tube abuts on a bottom wall of the dust cup.
 5. Theseparation structure according to claim 4, wherein a height from anupper surface of the connecting ring to a lower surface of the flatplate is H1, a height of the conical tube is H2, and a ratio of H2 to H1is in a range of 2 to
 3. 6. The separation structure according to claim5, wherein a height of the filter screen is H3, and a ratio of H3 to H1is in a range of 2 to 2.5.
 7. The separation structure according toclaim 6, wherein a maximum outer diameter of the air inlet along acentral axis is D1, an outer diameter of the filter screen is D2, and aratio of D1 to D2 is in a range of 0.8 to 0.9.
 8. The separationstructure according to claim 7, wherein a distance from an outermostside of the dust-proof skirt to an inner side surface of the dust cup isD3, which is in a range of 6 mm to 10 mm.